From b9593db1a31e553cadcca246ce40f901ca0e7ff0 Mon Sep 17 00:00:00 2001 From: Prabhat Sharma Date: Mon, 18 Mar 2024 09:57:44 +0530 Subject: [PATCH] Added static setting for checkPendingFlushUpdate functionality of lucene writer Signed-off-by: Prabhat Sharma --- CHANGELOG.md | 1 + .../common/settings/IndexScopedSettings.java | 1 + .../org/opensearch/index/IndexSettings.java | 20 ++++++++++++++++++- .../index/engine/InternalEngine.java | 1 + 4 files changed, 22 insertions(+), 1 deletion(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index c4558cf3fe251..6667b1fbca3f0 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -118,6 +118,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), - [Tiered caching] Add Stale keys Management and CacheCleaner to IndicesRequestCache ([#12625](https://github.com/opensearch-project/OpenSearch/pull/12625)) - [Tiered caching] Add serializer integration to allow ehcache disk cache to use non-primitive values ([#12709](https://github.com/opensearch-project/OpenSearch/pull/12709)) - [Admission Control] Integrated IO Based AdmissionController to AdmissionControl Framework ([#12583](https://github.com/opensearch-project/OpenSearch/pull/12583)) +- Introduce a new setting `index.check_pending_flush.enabled` to expose the ability to disable the check for pending flushes by write threads ([#12710](https://github.com/opensearch-project/OpenSearch/pull/12710)) ### Dependencies - Bump `peter-evans/find-comment` from 2 to 3 ([#12288](https://github.com/opensearch-project/OpenSearch/pull/12288)) diff --git a/server/src/main/java/org/opensearch/common/settings/IndexScopedSettings.java b/server/src/main/java/org/opensearch/common/settings/IndexScopedSettings.java index 49bb3abf1decd..c6c312d6b6eea 100644 --- a/server/src/main/java/org/opensearch/common/settings/IndexScopedSettings.java +++ b/server/src/main/java/org/opensearch/common/settings/IndexScopedSettings.java @@ -207,6 +207,7 @@ public final class IndexScopedSettings extends AbstractScopedSettings { IndexSettings.INDEX_MERGE_ON_FLUSH_MAX_FULL_FLUSH_MERGE_WAIT_TIME, IndexSettings.INDEX_MERGE_ON_FLUSH_POLICY, IndexSettings.INDEX_MERGE_POLICY, + IndexSettings.INDEX_CHECK_PENDING_FLUSH_ENABLED, LogByteSizeMergePolicyProvider.INDEX_LBS_MERGE_POLICY_MERGE_FACTOR_SETTING, LogByteSizeMergePolicyProvider.INDEX_LBS_MERGE_POLICY_MIN_MERGE_SETTING, LogByteSizeMergePolicyProvider.INDEX_LBS_MAX_MERGE_SEGMENT_SETTING, diff --git a/server/src/main/java/org/opensearch/index/IndexSettings.java b/server/src/main/java/org/opensearch/index/IndexSettings.java index d750a13dece64..5aaea2c498701 100644 --- a/server/src/main/java/org/opensearch/index/IndexSettings.java +++ b/server/src/main/java/org/opensearch/index/IndexSettings.java @@ -624,6 +624,16 @@ public static IndexMergePolicy fromString(String text) { Property.IndexScope ); + /** + * Expert: Makes indexing threads check for pending flushes on update in order to help out + * flushing indexing buffers to disk. This is an experimental Apache Lucene feature. + */ + public static final Setting INDEX_CHECK_PENDING_FLUSH_ENABLED = Setting.boolSetting( + "index.check_pending_flush.enabled", + true, + Property.IndexScope + ); + public static final Setting TIME_SERIES_INDEX_MERGE_POLICY = Setting.simpleString( "indices.time_series_index.default_index_merge_policy", DEFAULT_POLICY, @@ -816,7 +826,10 @@ private void setRetentionLeaseMillis(final TimeValue retentionLease) { * Specialized merge-on-flush policy if provided */ private volatile UnaryOperator mergeOnFlushPolicy; - + /** + * Is flush check by write threads enabled or not + */ + private final boolean checkPendingFlushEnabled; /** * Is fuzzy set enabled for doc id */ @@ -959,6 +972,7 @@ public IndexSettings(final IndexMetadata indexMetadata, final Settings nodeSetti maxFullFlushMergeWaitTime = scopedSettings.get(INDEX_MERGE_ON_FLUSH_MAX_FULL_FLUSH_MERGE_WAIT_TIME); mergeOnFlushEnabled = scopedSettings.get(INDEX_MERGE_ON_FLUSH_ENABLED); setMergeOnFlushPolicy(scopedSettings.get(INDEX_MERGE_ON_FLUSH_POLICY)); + checkPendingFlushEnabled = scopedSettings.get(INDEX_CHECK_PENDING_FLUSH_ENABLED); defaultSearchPipeline = scopedSettings.get(DEFAULT_SEARCH_PIPELINE); /* There was unintentional breaking change got introduced with [OpenSearch-6424](https://github.com/opensearch-project/OpenSearch/pull/6424) (version 2.7). * For indices created prior version (prior to 2.7) which has IndexSort type, they used to type cast the SortField.Type @@ -1844,6 +1858,10 @@ private void setMergeOnFlushPolicy(String policy) { } } + public boolean isCheckPendingFlushEnabled() { + return checkPendingFlushEnabled; + } + public Optional> getMergeOnFlushPolicy() { return Optional.ofNullable(mergeOnFlushPolicy); } diff --git a/server/src/main/java/org/opensearch/index/engine/InternalEngine.java b/server/src/main/java/org/opensearch/index/engine/InternalEngine.java index e204656d3f106..a25ec95f58e05 100644 --- a/server/src/main/java/org/opensearch/index/engine/InternalEngine.java +++ b/server/src/main/java/org/opensearch/index/engine/InternalEngine.java @@ -2336,6 +2336,7 @@ private IndexWriterConfig getIndexWriterConfig() { iwc.setMaxFullFlushMergeWaitMillis(0); } + iwc.setCheckPendingFlushUpdate(config().getIndexSettings().isCheckPendingFlushEnabled()); iwc.setMergePolicy(new OpenSearchMergePolicy(mergePolicy)); iwc.setSimilarity(engineConfig.getSimilarity()); iwc.setRAMBufferSizeMB(engineConfig.getIndexingBufferSize().getMbFrac());